The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Summary of Significant Accounting Policies - Principles of Consolidation (Details)	Jan. 01, 2016	Dec. 31, 2015	Jun. 30, 2015	Mar. 31, 2015
CMBS
Consolidation
Percentage of ownership	100.00%	40.00%	40.00%	20.00%